rust/tests/ui/dst/issue-90528-unsizing-suggestion-3.rs

23 lines
699 B
Rust

// Issue #90528: provide helpful suggestions when a trait bound is unsatisfied
// due to a missed unsizing coercion.
//
// This test exercises array literals and a trait implemented on mutable slices.
trait Write {}
impl Write for &mut [u8] {}
fn wants_write(_: impl Write) {}
fn main() {
wants_write([0u8]);
//~^ ERROR the trait bound `[u8; 1]: Write` is not satisfied
wants_write(&mut [0u8]);
//~^ ERROR the trait bound `&mut [u8; 1]: Write` is not satisfied
wants_write(&mut [0u8][..]);
wants_write(&[0u8]);
//~^ ERROR the trait bound `&[u8; 1]: Write` is not satisfied
wants_write(&[0u8][..]);
//~^ ERROR the trait bound `&[u8]: Write` is not satisfied
}